Okay, the NASA website says
Howard's final DESCENT has begun.
The Big Bang Theory Season 6, Episode 4
This might be the first step
of my DESCENT into madness.
The Big Bang Theory Season 9, Episode 10
the charlatan who claimed DESCENT
from the Children of the Forest.
Game of Thrones Season 7, Episode 5
Sheldon Cooper's DESCENT
into madness. Day two.
The Big Bang Theory Season 9, Episode 10
...an online blog
depicting his DESCENT into drug use...
The Big Bang Theory Season 1, Episode 10